update basic features and experimental features for v6.2

[shichun-0415]

What is changed, added or deleted? (Required)

Update basic features and experimental features for v6.2.0. The changes are listed as follows:

• ALTER TABLE ... COMPACT: experimental -> GA
• 前台限流: experimental -> GA
• 在单条语句中添加多列: experimental -> GA
• 使用线程池处理存储引擎的读请求: experimental
• Cost Model Version 2: experimental
• Fast Mode: experimental
• 后台限流: experimental
• 磁盘资源配额: experimental
• DM 增量数据校验: experimental
• RawKV 跨集群复制: experimental

Which TiDB version(s) do your changes apply to? (Required)

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions (in Chinese).

• [x] master (the latest development version)
• [x] v6.2 (TiDB 6.2 versions)
• [ ] v6.1 (TiDB 6.1 versions)
• [ ] v5.4 (TiDB 5.4 versions)
• [ ] v5.3 (TiDB 5.3 versions)
• [ ] v5.2 (TiDB 5.2 versions)
• [ ] v5.1 (TiDB 5.1 versions)
• [ ] v5.0 (TiDB 5.0 versions)

What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s):

Do your changes match any of the following descriptions?

• [ ] Delete files
• [ ] Change aliases
• [ ] Need modification after applied to another branch
• [ ] Might cause conflicts after applied to another branch

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• Oreoxmt
• ran-huang

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment. After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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[TomShawn]

LGTM

[shichun-0415]

/cc @[email protected] @moyun @joey-yez

[easonn7]

TiKV 前台限流，TiKV 后台限流，在单条语句中添加多列 这三条 LGTM

[shichun-0415]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 3df5da3da267b18ebd7b70cc6f14aa57c8f1260d

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10985.